79642425 has 24 divisors (see below), whose sum is σ = 132179040. Its totient is φ = 42313600.

The previous prime is 79642421. The next prime is 79642427. The reversal of 79642425 is 52424697.

It is not a de Polignac number, because 79642425 - 2² = 79642421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79642421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19186 + ... + 22964.

It is an arithmetic number, because the mean of its divisors is an integer number (5507460).

Almost surely, 2^79642425 is an apocalyptic number.

79642425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79642425 is a deficient number, since it is larger than the sum of its proper divisors (52536615).

79642425 is a wasteful number, since it uses less digits than its factorization.

79642425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073 (or 4068 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 79642425 is about 8924.2604735631. The cubic root of 79642425 is about 430.2440024923.

The spelling of 79642425 in words is "seventy-nine million, six hundred forty-two thousand, four hundred twenty-five".